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प्रश्न
Find the odd one out and give its explanation.
विकल्प
Zinc coating
Tinning
Electroplating
Calcination
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उत्तर
Calcination
Explanation-
Calcination is a process involved in extraction of carbonate ores while others are methods used for prevention of corrosion.
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संबंधित प्रश्न
What chemical process is used for obtaining a metal from its oxide?
Write the composition of the alloy called bronze.
Give two uses of bronze.
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Reduction with aluminium.
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bauxite
Name the following:
The process of heating a substance very strongly in such a way that it does not combine with oxygen.
Explain the following:
Galvanization protects iron from rusting.
The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction which takes place at the cathode.
How many valence electrons are present in metals ?
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as ______.
Define roasting.
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Reactivity series of metals
- Name two metals which react with water.
- Name two moderately reactive metals.
- Name the most highly reactive metal and the most less reactive metal.
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The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
Give the reaction involved during extraction of zinc from its ore by
- roasting of zinc ore
- calcination of zinc ore
- Given below are the steps for extraction of copper from its ore. Write the reaction involved.
- Roasting of copper (I) sulphide
- Reduction of copper (I) oxide with copper (I) sulphide.
- Electrolytic refining
- Draw a neat and well labelled diagram for electrolytic refining of copper
